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B. HUBER & W. K.. HODGMAN.

PRINTING PRESS.

No. 593,582. Patented Nov. 16, 1897.

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BERTHOLD HUBER AND 'WILLIS K; HODGMAN, OF TAUNTON, MASSACHU- SETTS, ASSIGNORS TO THE HUBER PRINTING PRESS COMPANY, OF SAME PLACE.

PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 593,582, dated November 16, 1897.

Application filed January 18, 1897. Serial No. 619,526. (No model.)

To all whom it may concern.-

Be it known that we, BERTHOLD HUBER and WILLIS K. HODGMAN, of Taunton, county of Bristol,State of Massachusettshave invented an Improvementin Printing-Presses,of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to the class of printing-presses in which the impression-cylinder is continuously rotated and makes two or more revolutions while the reciprocating bed or form-carrier makes one complete stroke, the impression cylinder and form being slightly separated during the return of the latter. In such presses it is essential to the production of good work that the register shall be accurate-that is, difierent parts of the form must arrive opposite the same points on the cylinder at each impression-and we have attained such accuracy of register during the whole of the period of printing by positively moving the cylinder and bed or form-carrier in unison during such period.

In accordance therewith our invention consists, in a two or more revolution printingpress,of the means for moving the registeringgear in and out of the path of the registeringrack, substantially as will be described.

We have shown our invention by drawings and described it as applied to a two-revolution printing-press; but, as we have already stated, it is applicable to' any printing-press wherein the impression-cylinder makes two or more revolutions to one complete stroke of the bed or form-carrier.

Figure 1 is an elevation showing a portion of a printing-press embodying our invention with the parts in the center of the printing stroke; Fig. 2, a horizontal section on the line 1 2, Fig. 1; Fig. 3, a vertical section on the line 3 at, Fig. 1; and Fig. 4, a partial vertical section on the line 3 l, Fig. 1.

In Fig. 1 we have shown the upper part of the usual side rod which furnishes a suitable bearing for the impression-cylinder journal and also suitable bearings for the parts necessary to our invention.

In Fig. 4 the parts are shown in the center of the back stroke,'the impression-cylinder being raised a trifle to clear the form and the movable ring moved out, so that the toothed portion is out of the path of the register-rack.

In practice a suitable frame (not shown) provides bearings for the usual operating parts of a printing-press, and said parts may.

be operated by any well-known method applicable to a two-revolution printing-press and form no part of this invention.

The impression-cylinder a is journaled i side rods 04', the lower ends of which (not shown) are connected with suitable mechanism operated to keep the cylinder in contact with the form (not shown) supported by the bed a during the forward stroke of the bed and to raise the cylinder from contact with the form during the back stroke of the bed. The bed a is provided with a bearing a upon which runs the cylinder-bearing a during the printing stroke of the press. A bar a is shown as secured to one side of the bed a by suitable set-screws a, extended through longitudinal slots a in the bar into the bed, the bar having rack-teeth 0 formed thereon at its upper edge adjacent to the whole length of the longest form capable of being printed on the press to travel in one path during the reciprocation of the bed.

A movable ring 0 with toothed periphery adjacent to the whole length of the impression-surface of the cylinder, slides freely on the annular flange c of the cylinder-head, and also on the pins 0 which fill the holes 0 (see Fig.4) in the movable ring a and prevent it from rotating independently of the impression-cylinder a. The pinion cl, mounted on the end of the cylinder-journal, meshes with the gear d on the cam d and causes the cam d to make one complete turn in the direction of the arrow (see Fig. 1) during one complete stroke of the press. The cam d works between the rollers 61 on the pins d in the free ends of the forked lever (F. The forked lever (Z is mounted near one end of the shaft 6, which latter is journaled in the bearings e. shaft 6 is mounted a lever 6 There are slots e in the levers d and c which engage the T-heads of the T-pins 8 (see Fig. 3,) the stem ends of which latter engage the blocks e which arefastened to the outside ends of the Near the opposite end of ICO space (not shown) on the tail end of the rack o, 4

when the cam d will commence to operate and through means of the intervening mechanism shown and described will cause the movable ring 0 to be moved outward into-the position shown in Fig. 4, so that the toothed portion of the movable ring a revolves in a path outside of the rack 0 during a little more than the period when the impressionsurface on. the cylinder and the form on the bed are passing eachother during the back f J ust after the teeth on J stroke of the press.

the movable ring 0 and rack a have cleared each other on the back stroke the cam (1 commences to operate again and causes the movable ring 0 to be moved back into the position shown in Fig. 3, so as to allow the toothed portion thereof to mesh with the rack c during the Whole of the period of printing on the forward or printing stroke of the press.

We are aware that to move the toothed ring or registering-gear c in and out of the path of the registering-rack laterally is not a new idea; but

What we do claim as new, and wish to secure by Letters Patent, is- I In a printing-press of the character describedthe registering-gear, two sliding st uds'a-s c with slides as f mounted on the inner ends thereof to engage the registeringgear substantially as shown and a cam as d all con- ;nected to operate substantially as described for the purpose specified. V

BERTHOLD HUBER. WILLIS K. HODGMAN. W'itnesses:

F. M. Arwoon, ROBERT L. CRossMAN. 

